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Class Information
Number: 137/50
Name: Fluid handling > Speed responsive valve control > Speed change and excess speed valve control
Description: Control systems wherein the driven means is operable to vary the extent of opening of the valve or valves in response to changes in speed and to effect closing of the valve or valves in response to a speed above a predetermined speed.

Patents under this class:

Patent Number Title Of Patent Date Issued
8066491 Reciprocating pump with electronically monitored air valve having battery and solenoid electronic monitoring Nov. 29, 2011
7051750 Governor spring bracket assembly May. 30, 2006
6908277 Speed governor for a pneumatic rotation motor Jun. 21, 2005
6899514 Overspeed safety device May. 31, 2005
6695573 Hand-held turbine power tool Feb. 24, 2004
6200111 Controllable high volume positive displacement pump Mar. 13, 2001
6179552 Speed control unit for a pneumatic rotation motor Jan. 30, 2001
6158970 Variable displacement compressor Dec. 12, 2000
4766926 Hydraulic unloading valves Aug. 30, 1988
4465443 Pneumatic power tool with speed governor and overspeed safety device Aug. 14, 1984
4298317 Overspeed safety device Nov. 3, 1981
4278103 Overspeed control means for pneumatic tools Jul. 14, 1981
4184819 Secondary speed sensor for governed air grinders Jan. 22, 1980
3930764 Air tool overspeed shutoff device Jan. 6, 1976

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